First of all, you need to stop saying that phrase. You are assuming that when it seems that actually your family has some issue that you need to bluntly discuss with them. I do not think that you should be around people (even family) if they are a negative force in your life. I think you should let them know that you feel left out etc., and then if it continues you need to tell them that you think it is best for you to have some space for a while from them because when people stay in situations that make them feel "unworthy" they begin to believe this. Also, you are wasting your own time trying to please others and you should always put yourself first. Try not to say negative things about yourself because you need to be happy with yourself and staying out of negative situations is the first step!